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  1. // Backward-compat support -*- C++ -*-
  2.  
  3. // Copyright (C) 2001-2015 Free Software Foundation, Inc.
  4. //
  5. // This file is part of the GNU ISO C++ Library.  This library is free
  6. // software; you can redistribute it and/or modify it under the
  7. // terms of the GNU General Public License as published by the
  8. // Free Software Foundation; either version 3, or (at your option)
  9. // any later version.
  10.  
  11. // This library is distributed in the hope that it will be useful,
  12. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14. // GNU General Public License for more details.
  15.  
  16. // Under Section 7 of GPL version 3, you are granted additional
  17. // permissions described in the GCC Runtime Library Exception, version
  18. // 3.1, as published by the Free Software Foundation.
  19.  
  20. // You should have received a copy of the GNU General Public License and
  21. // a copy of the GCC Runtime Library Exception along with this program;
  22. // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23. // <http://www.gnu.org/licenses/>.
  24.  
  25. /*
  26.  * Copyright (c) 1998
  27.  * Silicon Graphics Computer Systems, Inc.
  28.  *
  29.  * Permission to use, copy, modify, distribute and sell this software
  30.  * and its documentation for any purpose is hereby granted without fee,
  31.  * provided that the above copyright notice appear in all copies and
  32.  * that both that copyright notice and this permission notice appear
  33.  * in supporting documentation.  Silicon Graphics makes no
  34.  * representations about the suitability of this software for any
  35.  * purpose.  It is provided "as is" without express or implied warranty.
  36.  */
  37.  
  38. // WARNING: The classes defined in this header are DEPRECATED.  This
  39. // header is defined in section D.7.1 of the C++ standard, and it
  40. // MAY BE REMOVED in a future standard revision.  One should use the
  41. // header <sstream> instead.
  42.  
  43. /** @file strstream
  44.  *  This is a Standard C++ Library header.
  45.  */
  46.  
  47. #ifndef _BACKWARD_STRSTREAM
  48. #define _BACKWARD_STRSTREAM
  49.  
  50. #include "backward_warning.h"
  51. #include <iosfwd>
  52. #include <ios>
  53. #include <istream>
  54. #include <ostream>
  55. #include <string>
  56.  
  57. namespace std _GLIBCXX_VISIBILITY(default)
  58. {
  59. _GLIBCXX_BEGIN_NAMESPACE_VERSION
  60.  
  61.   // Class strstreambuf, a streambuf class that manages an array of char.
  62.   // Note that this class is not a template.
  63.   class strstreambuf : public basic_streambuf<char, char_traits<char> >
  64.   {
  65.   public:
  66.     // Types.
  67.     typedef char_traits<char>              _Traits;
  68.     typedef basic_streambuf<char, _Traits> _Base;
  69.  
  70.   public:
  71.     // Constructor, destructor
  72.     explicit strstreambuf(streamsize __initial_capacity = 0);
  73.     strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
  74.  
  75.     strstreambuf(char* __get, streamsize __n, char* __put = 0) throw ();
  76.     strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0) throw ();
  77.     strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0) throw ();
  78.  
  79.     strstreambuf(const char* __get, streamsize __n) throw ();
  80.     strstreambuf(const signed char* __get, streamsize __n) throw ();
  81.     strstreambuf(const unsigned char* __get, streamsize __n) throw ();
  82.  
  83.     virtual ~strstreambuf();
  84.  
  85.   public:
  86.     void freeze(bool = true) throw ();
  87.     char* str() throw ();
  88.     _GLIBCXX_PURE int pcount() const throw ();
  89.  
  90.   protected:
  91.     virtual int_type overflow(int_type __c  = _Traits::eof());
  92.     virtual int_type pbackfail(int_type __c = _Traits::eof());
  93.     virtual int_type underflow();
  94.     virtual _Base* setbuf(char* __buf, streamsize __n);
  95.     virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
  96.                              ios_base::openmode __mode
  97.                              = ios_base::in | ios_base::out);
  98.     virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
  99.                              = ios_base::in | ios_base::out);
  100.  
  101.   private:
  102.     strstreambuf&
  103.     operator=(const strstreambuf&);
  104.  
  105.     strstreambuf(const strstreambuf&);
  106.  
  107.     // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
  108.     char* _M_alloc(size_t);
  109.     void  _M_free(char*);
  110.  
  111.     // Helper function used in constructors.
  112.     void _M_setup(char* __get, char* __put, streamsize __n) throw ();
  113.  
  114.   private:
  115.     // Data members.
  116.     void* (*_M_alloc_fun)(size_t);
  117.     void  (*_M_free_fun)(void*);
  118.  
  119.     bool _M_dynamic  : 1;
  120.     bool _M_frozen   : 1;
  121.     bool _M_constant : 1;
  122.   };
  123.  
  124.   // Class istrstream, an istream that manages a strstreambuf.
  125.   class istrstream : public basic_istream<char>
  126.   {
  127.   public:
  128.     explicit istrstream(char*);
  129.     explicit istrstream(const char*);
  130.     istrstream(char* , streamsize);
  131.     istrstream(const char*, streamsize);
  132.     virtual ~istrstream();
  133.  
  134.     _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
  135.     char* str() throw ();
  136.  
  137.   private:
  138.     strstreambuf _M_buf;
  139.   };
  140.  
  141.   // Class ostrstream
  142.   class ostrstream : public basic_ostream<char>
  143.   {
  144.   public:
  145.     ostrstream();
  146.     ostrstream(char*, int, ios_base::openmode = ios_base::out);
  147.     virtual ~ostrstream();
  148.  
  149.     _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
  150.     void freeze(bool = true) throw();
  151.     char* str() throw ();
  152.     _GLIBCXX_PURE int pcount() const throw ();
  153.  
  154.   private:
  155.     strstreambuf _M_buf;
  156.   };
  157.  
  158.   // Class strstream
  159.   class strstream : public basic_iostream<char>
  160.   {
  161.   public:
  162.     typedef char                        char_type;
  163.     typedef char_traits<char>::int_type int_type;
  164.     typedef char_traits<char>::pos_type pos_type;
  165.     typedef char_traits<char>::off_type off_type;
  166.  
  167.     strstream();
  168.     strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
  169.     virtual ~strstream();
  170.  
  171.     _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
  172.     void freeze(bool = true) throw ();
  173.     _GLIBCXX_PURE int pcount() const throw ();
  174.     char* str() throw ();
  175.  
  176.   private:
  177.     strstreambuf _M_buf;
  178.   };
  179.  
  180. _GLIBCXX_END_NAMESPACE_VERSION
  181. } // namespace
  182.  
  183. #endif
  184.